A new species of the genus Neoverruca (Cirripedia, Thoracica, Verrucidea, Neoverrucidae) from a hydrothermal vent area in the Okinawa Trough

in Crustaceana
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A new species of the neoverrucid barnacle genus Neoverruca Newman, 1989, N. intermedia sp. nov., collected from a hydrothermal vent area in the Okinawa Trough, is described and illustrated. It differs from N. brachylepadoformis Newman, 1989 by the apical end of the inner surface of the movable scutum being in a pocket-form, with a longitudinal groove upwards, and without median ridges; the adductor ridge (or myophore) of the fixed scutum stout and the inner distal part of the scutum without longitudinal ridge.

A new species of the genus Neoverruca (Cirripedia, Thoracica, Verrucidea, Neoverrucidae) from a hydrothermal vent area in the Okinawa Trough

in Crustaceana

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References

BuckeridgeJ. S.1983. Fossil barnacles (Cirripedia: Thoracica) of New Zealand and Australia. New Zealand Geological Survey Paleontological Bulletin50: 1-151.

BuckeridgeJ. S.1994. Cirripedia Thoracica: Verrucomorpha of New Caledonia, Indonesia, Wallis and Futuna Islands. In: CrosnierA. (ed.) Résultats des Campagnes MUSORSTOM12. Mémoires du Muséum national d’Histoire naturelle Paris 161: 87-125.

HerreraS.WatanabeH.ShankT. M.2015. Evolution and biogeographical patterns of barnacles from deep-sea hydrothermal vents. Molecular Ecology24: 673-689.

NewmanW. A.2000. A new genus and species of barnacle (Cirripedia, Verrucomorpha) associated with vents of the Lau Back-Arc Basin: its gross morphology, inferred first juvenile stage and affinities. Zoosystema22(1): 71-84.

NewmanW. A.HesslerR. R.1989. A new abyssal hydrothermal verrucomorphan (Cirripedia: Sessilia): the most primitive living sessile barnacle. Transactions of the San Diego Society of Natural History21(16): 259-273.

PilsbryH. A.1916. The sessile barnacles (Cirripedia) collected in the collections of the U.S. National Museum, including a monograph of the American species. United States National Museum Bulletin93: 1-366.

RenX. Q.1984. Studies on Chinese Cirripedia (Crustacea). IV. Family Verrucidae. Studia Marina Sinica23: 165-179. [In Chinese and with English abstract.]

WatanabeH.KojimaS.2015. Vent fauna in the Okinawa Trough. In: IshibashiJ. I.OkinoK.SunamuraM. (eds.) Subseafloor biosphere linked to hydrothermal systems TAIGA concept: 449-459. (SpringerTokyo).

WatanabeH.TsuchidaS.FujikuraK.YamamotoH.InagakiF.KyoM.KojimaS.2005. Population history associated with hydrothermal vent activity inferred from genetic structure of neoverrucid barnacles around Japan. Marine Ecolology Progress Series288: 233-240.

Figures

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    Neoverruca intermedia sp. nov.: a, holotype; a1, complete shell (dorsal view); a2, complete shell (fixed tergal-fixed scutal view); b-e, outlines of different individuals: b1, c1, d1, e1: complete shells in dorsal view, respectively; b2, c2, d2, e2: complete shells in fixed tergal-fixed scutal view, respectively; f, outline of individual with only trace of latus left; g, outline of individual with latus lost.

  • View in gallery

    Neoverruca intermedia sp. nov.: a, shells: a1, movable scutum (exterior); a2, movable scutum (interior); a3, movable tergum (exterior); a4, movable tergum (interior); a5, fixed scutum (exterior); a6, fixed scutum (interior); a7, fixed tergum (exterior); a8, fixed tergum (interior); b, scutum and tergum: b1, movable scutum (interior); b2, movable tergum (interior); b3, fixed scutum (interior); b4, fixed tergum (interior); c, d, movable tergum interior view, respectively; e, f, fixed scutum and tergum: e1, f1, fixed scutum interior view; e2, f2, fixed tergum interior view; g, h, fixed scutum interior view, respectively; i, fixed tergum interior view; j, latus exterior and interior view, respectively; k, small individual and basal whorls of imbricating plates; k1, small individual; k2, basal ribs of imbricating plate (exterior); k3, basal ribs of imbricating plate (interior).

  • View in gallery

    Neoverruca intermedia sp. nov.: a, soft body; b, labrum and palp; c, mandible; d, maxilla I; e, maxilla II; g, cirrus II; h, interior view of cirrus II; i, cirrus III; j, cirrus VI and penis; k, intermediate segments of cirrus VI; l, terminal end of penis.

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